1 ; edgefailure - This function illustrates how SCCP is not doing it's job. This
2 ; function should be optimized almost completely away: the loop should be
3 ; analyzed to detect that the body executes exactly once, and thus the branch
4 ; can be eliminated and code becomes trivially dead. This is distilled from a
5 ; real benchmark (mst from Olden benchmark, MakeGraph function). When SCCP is
6 ; fixed, this should be eliminated by a single SCCP application.
8 ; RUN: llvm-upgrade < %s | llvm-as | opt -sccp | llvm-dis | not grep loop
15 %i = phi int [ %i2, %bb2 ], [ 0, %bb1 ] ;; Always 0
16 %i2 = add int %i, 1 ;; Always 1
18 %loop = setle int %i2, 0 ;; Always false
19 br bool %loop, label %bb2, label %bb3